1. If Tom (wear) a warm coat, he wouldn't have caught a cold.
2. I (not / have) a sore stomach if I hadn't eaten so much.
3. My birthday party would have been a success if I (buy) enough food for 20 people.
4. If Mr Jones (not / kill) Mrs Jones, he would not have been imprisioned.
5. If Felix Hoffmann (not / invent) Aspirin, we all would have suffered a lot more in our lives.
6. They would have been in time for the meeting if they (take) the plane.
7. If Susan (not / spend) so much time at the hairdresser, she would have met John at the party.
8. If John (tell) Sarah that he liked her, she would have gone for a walk with him.
9. I would not have had such a hard time if I (study) something else.
10. If Tom (apply) to that job, he would have travelled a lot by now.
11. If Becky (have) an eye on her daughter, she would not have run on the street.
12. Angela Merkel wouldn't have become Germany's Federal Chancellor if they (not / open) the "Berlin Wall".
13. If you (do) your homework, you could have gone outside.
14. If she had organised her life, she (get) a new boyfriend.
15. Caroline would not have got lost if she (listen) to her boyfriend.
16. If I (not / have) an accident, I would have visited you.
17. We (go) by bike if it had not started to snow.
18. If she had gone to the swimming pool, she (see) her friend Tom there.
19. The plane (be) in time if the pilot hadn't arrived too late.
20. If his boss (not / fire) him, he would have bought a new car.